PROCESS AND MOULD FOR PRODUCING PADDED SEAT BACKS

摘要

A process and mold for producing padded motor vehicle seat backs containing a metal framework surrounded by polyurethane foam in a plastic coating. The framework is inserted through a slit in the coating which is then sealed. Then the polyurethane foam is injected through a flexible filler neck into the coating and allowed to polymerize. After polymerization the filler neck is cut off. The framework may be contained in a plastic bag together with a relatively resilient foamed plastic body. The coating may be pressurized inwardly and pressure in the mold may be reduced during injection of the polyurethane foam. The mold comprises a pair of lateral mold parts and a central mold part together defining the mold cavity. The lateral mold parts are movable toward and away from the central mold part by hydraulic or pneumatic rams.